upgrade lirbaries, add travis

Author: rwieruch

.travis.yml

@@ -0,0 +1,10 @@
+language: node_js
+
+node_js:
+  - stable
+
+install:
+  - npm install
+
+script:
+  - npm test

README.md

@@ -1,6 +1,6 @@
 # react-apollo-client-optimistic-ui-example
 
-[![Slack](https://slack-the-road-to-learn-react.wieruch.com/badge.svg)](https://slack-the-road-to-learn-react.wieruch.com/)
+[![Build Status](https://travis-ci.org/the-road-to-graphql/react-apollo-client-optimistic-ui-example.svg?branch=master)](https://travis-ci.org/the-road-to-graphql/react-apollo-client-optimistic-ui-example) [![Slack](https://slack-the-road-to-learn-react.wieruch.com/badge.svg)](https://slack-the-road-to-learn-react.wieruch.com/)
 
 A minimal React application using Apollo Client with GitHub's GraphQL API. As example **Apollo Client's optimistic UI feature is implemented**.